.search_history
{
  width: 150px;
  height: 200px;
  display: block;
  background-color: red;
}

.search_history_hidden
{
  width: 150px;
  height: 200px;
  display: none;
  background-color: red;
}
.history_hover
{
  background-color: green;
}

.button_show
{
  display: block;
}

.button_hidden
{
  display: none;
}

.history_item
{
  width: 100%;
  display: inline-flex;
  justify-content:space-between;
  align-items: center;
}